Background and Contractual Framework

Comanche Maverick Ranch Investments, L.P., a landowner using its south Texas property primarily for wildlife management, leased 300 mineral acres to Endeavor Natural Gas III, LLC for oil and gas exploration and production. The parties executed an 18-page lease accompanied by a 29-page surface use agreement. Within that surface use agreement, a seismic provision granted Endeavor the right to conduct geophysical operations on the land "only after first entering into a mutually agreed-upon seismic surface use permit" with Comanche. When Endeavor's counsel requested good faith discussions for such a permit, Comanche's counsel responded that the provision was unenforceable and that Comanche had "no obligation" to enter into any seismic use permit. Endeavor nevertheless notified Comanche of its intent to commence seismic operations, precipitating competing summary judgment motions for declaratory relief.

The Condition Precedent Analysis

The Fourteenth Court of Appeals, applying de novo review, held that the seismic provision constituted an unambiguous condition precedent. Citing Solar Applications Engineering, Inc. v. T.A. Operating Corp., the court explained that "[a] condition precedent is an event that must happen or be performed before a right can accrue to enforce an obligation." The court found that the phrase "only after" manifested conditional intent, analogizing to the First Court of Appeals' decision in Tabe v. Texas Inpatient Consultants, LLLP, where identical "only after" language created a condition precedent to salary payment. The court concluded that Endeavor's right to perform seismic operations would accrue "only after the parties 'mutually agreed' on a seismic permit."

The Meaning of 'Mutually Agree'

The court's critical interpretive move addressed whether "mutually agree" imposed a duty to negotiate or granted each party unilateral veto power. Relying on dictionary definitions and the Austin Court of Appeals' decision in Fish v. Texas Legislative Service, the court held that "mutual" means "reciprocally given, received, or exchanged" and that mutual agreement "belongs to each party and may be given only on that party's volition." The court stated:

Construed in conjunction with these authorities, the seismic provision's use of "mutually agree" means that both Comanche and Endeavor must assent to a permit before seismic operations may commence. The provision does not require that the parties agree—rather, agreement is something that belongs to each party and may be given only on that party's volition.

The court rejected Endeavor's argument that this construction rendered the provision illusory because Comanche would never have an incentive to permit seismic operations, noting bluntly: "That may be true, but we cannot rewrite an agreement that Endeavor wishes it hadn't made."

Rejection of Contractual Interpretation Arguments

Endeavor argued that other provisions in the surface use agreement expressly gave Comanche discretion to grant or withhold consent "in its sole discretion"—such as operations within 1,500 feet of headquarters or resale of caliche—and that the absence of such language in the seismic provision meant Comanche lacked unilateral veto power. The court rejected this expressio unius argument, explaining that those other provisions required simple yes-or-no answers, whereas the seismic provision "required the parties to agree to details like how and when Endeavor could conduct seismic operations and how much it would pay." The court found it logical that both parties would need to agree on such complex terms, and if they failed to do so, "the rest of the surface use agreement remained in place, but Endeavor couldn't conduct seismic operations."

Performance Excuse Doctrine Inapplicable

Endeavor alternatively argued that even if the provision was a valid condition precedent, Comanche's refusal to negotiate excused performance under the doctrine that "[w]hen one contracting party prevents another from performing a condition precedent, performance is excused." The court rejected this theory, holding that applying the prevention doctrine would "render meaningless the parties' agreement that each party has its own right to assent to a permit." The court acknowledged that "[t]he contours of this doctrine have not been well developed by the courts" but found it inapplicable given the express "mutually agreed" language.

Implications for Surface Use Negotiations

This decision provides critical guidance for operators and landowners negotiating surface use agreements in Texas. The opinion demonstrates that courts will enforce "mutually agreed" language as creating bilateral veto rights without implying duties to negotiate in good faith, even where one party lacks economic incentive to agree. Operators should avoid such language if they intend to preserve seismic rights, instead negotiating for either unconditional rights or provisions requiring landowner consent that "shall not be unreasonably withheld." The decision also illustrates judicial reluctance to rescue sophisticated parties from unfavorable bargains, with the court's pointed observation that it cannot "rewrite an agreement that Endeavor wishes it hadn't made" serving as a cautionary tale for operators who may underestimate the practical effect of seemingly innocuous "mutual agreement" provisions in ancillary documents.